Pipe-machine



(NovModel.) P. M. SPEED.

. 'PPB MAGHI-NB. y, No. 503,102. Patented Aug. 8, 1893.

54M ma@ vIO NITRD, STATES rRANCIS M. SPEED, 'or SAN FRANCISCO, CALIFORNIA.

ATRNT rrICE.

,fPlPE-MACHINE.

SPECIFICATION forming part of Letters "Patent No. 503,102, dated August 8, 1893.

I Applicatiornriiled August 2, 1892. Serial No. 441,939. (No model.)

To a/ZZ whom t may concern:

Be it known that I, FRANCIS M. SPEED, a citizen of the United States, residing in the city and county of San Francisco, State of California, have invented an Improvement in Pipe-Machines; and I hereby declare the followingto'be a full, clear, and exact description of the same.` 1 Y My invention' relates to that class of pipemachines in which aiiask confines a charge of plastic material,in to which a core is forced whereby the materialis molded within the flask about the core, to form the pipe. This class is exemplified by my Patent No. 437,871,

dated October 7, 1890.

My invention'consists in connection'with an apparatus of this class of a movable plate within the base of Vthe flask serving as a means forwithdrawing the completed pipe.

It further consists in connection with said movable plate, of a rgdextending therefrom through the iask,-and serving the double purpose of providing for moving the plate, and as a guide for the core in its movement into the flask.

It also consists in connection with said guide rod of a Xed guide within the core for further insuring the proper movement thereof.

In machines of this class it has been found difiicult'to remove the pipe from the iiask af ter it has been formed and properly set; and it is also of importance to accurately guide the core in the `formation of the pipe.

The objects of myinvention are to provide simple and effective 'means for withdrawing the pipe from the flask and for accurately guiding the core. n Y

Referring to the accompanying drawings for a more complete explanation of my inven'- tion,--,Figure I is avertical section of my machine or'apparatus showing the material within the4 iiask, and the core about to be forced down into it. Fig. 2 is an enlarged section of the same. Fig. 3 is a vertical section showing the core fully forced down into the material and the latter molded'about itinto the shape of the pipe. Fig. 4 is a cross section ofV the manufactured article.

A is the flask, Secured at its lower end to a suitable base B. The upperend is covered by a plate F having a central opening f, and removably secured by means of suitable studs h and keys z'. This covered plate is provided also with the vent openings g.

C is the core adapted to fit closely in the central aperturefof the flask top, and to be forced down through said aperture, any suitable means being provided for effecting this movement. I have here indicated apresser K for this purpose. Y The core C is concentric with the iiask, and in order to guide it accurately in its movementtherein it fits upon a guide rod 'D which rises centrally through the flask, its upper end passing through Va suitable central hole d in the bottom of the core. Additional accuracy of movement is insured by means of vthe interiorperforated guide j fixed within the core which for this purpose is made' hollow as shown, said guide being preferably of a conical or funnel shape. Within the base of the iiask is a plate E which may or may not form the bottom of said cylinder. It is best that it shall so form the bottom as shown. It rests upon the base supportB and ismovable within the Iiask. The guide rod D is secured to or formed with this plate. Upon the inner surface of the flask is seated removably a lining L of suitable material, the lower end of which rests upon the movable plate E. This lining is for the purpose of preventing the material of which the pipe is formed from adhering to the iiask; and, to insure its perfeet operation in this respect, its meeting edges should overlap so that the material will not come in contact with the flaskll Around the exterior of the core is seated a suitable sheath M which prevents the material from adhering thereto.

The operation of the machine or apparatus is as follows: The material from which the pipe is to be made, such for example, as asphaltum or some compound thereof, or other plastic material, is placed, while'in a plastic condition in theflask, and in such quantity that the displacement due to the entrance therein of the core will cause it to more than fill the annular space between said core when fully seated and the inner wall of the flask, the surplus passing out through the vent apertures `g, the escape, however, being sufficiently difficult to provide for the necessary compression or molding of the material about the core. The amount of this material is sub- Though this movement of the plate E may` be effected in any suitable manner, the means here shown are preferable, namely, by suitable power applied to the rod D which is con nected with the plate. By raising said rod the plate will be lifted and the pipe will be drawn out from the flask. It will thus be` seen that the rod D serves the double purpose of a guide for the core, and of asimple means for operating the plat-e E to withdraw the formed pipe.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. In a pipe-machine havinga molding flask and a core operating axially, to compress and lnold plastic material therein, a rod in the flask upon which the core is guided,substantially as herein described.

2. In apipe-machine having a molding flask and a core operating axially to compress and mold plastic material therein, a rod in the flask upon which the core is guided, and an interior fixed guide within said core fitting over the rod, substantially as herein described.

3. In apipe-machine having a molding `flask and a core operating axially, to compress and mold plastic material therein, a movable plate in the base of the flask and a rod secured to said plate and passing through the flask, said rod forming both a guide for the core and a means for moving the plate to withdraw the pipe, substantially as herein described.

4. A pipe-making machine consisting ofthe molding flask having the removable cover with vents, the reciprocating core operating through said cover into the flask, the movable plate in the base of the flask, the rod rising therefrom and passing through the base of the core, and the fixed guide within the core operating over the rod, substantially as herein described.

5. A pipe machine having a ilask closed at the bottom and open at the top and havinga removable flask top provided With a central aperture to receive the core; the removable plate arranged within the flask on the base of the llask and provided with an upwardly projecting guide rod extending to the top of the flask and adapted for withdrawing the plate and the molded pipe from the flask, and the core provided in its bottom with a suitable central hole to receive such rod, and provided within the core intermediate its length with a perforated guide of a conical or funnel shape arranged to receive and engage such guide rod to center the core within the flask when the core is forced downward into the ilask.

In witness whereof I have hereunto set my hand.

FRANCIS M. SPEED. Witnesses:

JAMES R. TowNsENn, WM. LACY, Jr. 

